Resilient mounting

ABSTRACT

An elastomeric tubular bushing includes a central body portion and opposite end portions. One end portion is an enlarged head that projects radially outside the body portion. The other end portion is an elongate tubular skirt, the wall of which is arched radially outward beyond the body portion.

United States Patent 1 1 1111 3,895,408

Leingang July 22, 1975 RESILIENT MOUNTING 3,193,237 7/1965 Adams 267/153 3,675,881 7/1972 Caldwell [76] Inventor: Charla? Le'ngang 1535 42 1224,7513 12/1959 Thiry 403/224 St., Erle, Pa. 16509 [22] Filed: 1974 Primary ExaminerPatrick D. Lawson [21] Appl. No.: 438,120

52 us. 01. 16/2; 267/153; 308/237 A [57] ABSTRACT 51 Int. cl. B65D 7/48 An elastomeric tubular bushin i g includes a central [58] Fleld of Search 16/2 174/83" f body portion and opposite end portions. One end por- 174/153 308/237 237 48/9 tion is an enlarged head that projects radially outside 267/153 403/224 .the body portion. The other end portion is an elongate tubular skirt, the wall of which is arched radially out- [56] References ward beyond the body portion.

UNITED STATES PATENTS 3,033,624 5/1962 Bieseckor 174/153 G 8 Claims, 4 Drawing Figures PATENIEDJUL 22 I975 FIG. 4-

RESILIENT MOUNTING This invention relates to a resilient mounting and. more particularly. to a resilient mounting of unitary construction having an improved rebound capacity. while being relatively easy to install.

PRIOR ART More specifically, the present invention is directed to an improved resilient mounting over those disclosed in US. Pat. Nos. 2,828,095; 2,893,722; and 3,128,999. These patents illustrate resilient mountings comprising a bushing of elastomeric material having a central body portion and opposite end portions. One of the end portions comprises an enlarged head projecting radially outside the body of the bushing. The other end portion is in the form of a tubular skirt having an outside diameter substantially the same as the body of the bushing and having an inside diameter greater than the inside diameter of the body of the bushing. A rigid tubular sleeve is disposed within and secured to the bushing with one end terminating substantially flush with the head portion of the bushing. The other end of the sleeve terminates adjacent the skirt portion of the bushing in use. the bushing is disposed through an aperture in a supporting member with the head thereof resting or seated on the supporting member. A supported member rests or is seated upon the head of the bushing and includes an aperture therein aligned with the rigid sleeve. A through bolt is disposed through the supported member and bushing and extends beyond the skirt portion of the bushing. A washer plate is received on the bolt adjacent the skirt and is clamped against the skirt by nut means. During this clamping action, the skirt buckles and expands or bulges radially outward outside the diameter of the aperture in the supporting member and engages the surface of the supporting member opposite the head of the bushing. This skirt portion. thus, provides for rebound capabilities for the mounting.

In other embodiments. similar resilient mountings are disclosed except that the head portion is disposed centrally of the bushing with skirt portions at opposite ends. While these latter type mountings are capable of providing greater rebound capabilities in that the head portion serves both as the primary vibration isolator and rebound function. these mountings are of more complicated design and require different means of interconnection between a supporting and supported member.

SUMMARY or THE INVENTION With the foregoing in mind. it is an object of the present invention to provide a resilient mounting of unitary construction having improved rebound capacity.

Another object of the present invention is to provide a unitary resilient mounting including a bushing of elastomeric material having a central body portion and opposite end portions with one of the opposite end portions being an enlarged head and the other end being an improved skirt.

It is still a further object of the present invention to provide a resilient mounting of the foregoing construction wherein the skirt is so constructed to facilitate easy installation and provide an improved rebound capacity.

Briefly. the above objects and others, as will become apparent upon description of the present invention, are

provided by an clastomeric tubular bushing having a central portion and opposite end portions. One of the end portions comprises an enlarged head that projects radially beyond the body portion. The other end includes the novel features of the present invention and comprises an elongate tubular skirt extending axially from the body portion of the bushing. The tubular skirt has an internal diameter at least equal to the internal diameter of said body portion. The wall of the skirtis arched radially outward beyond the outside diameter of the body portion with the end of the skirt remote from the body portion tapering radially inward to an outside diameter substantially equal to that of the body portion. A rigid tubular sleeve may be secured. bonded. within the bushing. One end of the sleeve terminates flush with the enlarged head portion and the other end terminates adjacent the skirt. The arched and tapered configuration of the skirt facilitates installation of the bushing while allowing the use of sufficient elastomer in the skirt to provide improved rebound capacity.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a sectional view of a resilient mounting of the present invention; and 7 FIGS. 2, 3 and 4 are sectional views illustrating progressive stages of installation of the resilient mounting of FIG. 1.

DESCRIPTION OF PREFERRED EMBODIMENT With reference to FIG. 1, there is shown a resilient mounting. generally indicated at 10. of the present invention. As illustrated. the resilient mounting 10 com prises an elastomeric tubular bushing having a central body portion 11 and opposite end portions 12 and 13.

End portion 12 is in the shape of an enlarged head or flange that projects radially outside the body portion 11. The other end 13 comprises an elongate tubular skirt extending axially from the body portion 11. An elongate rigid sleeve 14 is bonded centrally within the bushing 10. One end of the sleeve 14 terminates substantially flush with the upper surface of the head 12 of the bushing 10. The other end of the sleeve 14 terminates adjacent the skirt 13 and does not extend to any substantial degree into the skirt 13. Preferably. as shown, there is an undercut 15 adjacent the juncture of the body portion 11 and skirt 13 so as to minimize the stress on the bond between the body portion 11 and sleeve 14.

The inside diameter of the skirt 13 throughout its length is at least equal to the internal diameter of the rigid sleeve 14 so as to receive therethrough a through bolt. The wall of the tubular skirt 13 is arched radially outward beyond the outside diameter of the body portion 11 and includes a thicker portion 13a intermediate opposite ends thereof. More particularly. the inside diameter of the skirt adjacent the body portion 11 is generally cylindrical and tapers radially inward adjacent the remote end of the skirt 13. The outside diameter of the skirt 13 adjacent the body portion 11 tapers radially outward to a section of generally cylindrical outside diameter. Beyond the cylindrical section. the skirt l3 tapers radially inward toward the other end of the skirt 13 to a diameter substantially equal to that of the body portion 11. The cylindrical inside and outside diameters of the skirt 13 are in opposed relation and define therebetween the thickened portion 13a. This construction of the skirt 13 allows the inclusion of more elastomer in a limited length for rebound capacity while providing easy installation.

With reference to FIGS. 24. there is illustrated progressive steps in the installation of the resilient mounting 10. As shown in FIG. 2, a supporting member is provided having an aperture 21 therein of substantially the same diameter as the external diameter of the central body portion 11 of the bushing 10 and the remote end of the skirt 13. The skirt 13 is inserted into the aperture 21 and pressure applied axially to the bushing 10 to force it through the aperture 21. As the skirt 13 is forced through the aperture 21, it will be collapsed or deflected radially inward to pass through the supporting member 21. Insertion of the bushing 10 is continued until the head 12 rests or seats upon the upper surface of the supporting member 20. The skirt 13 will resiliently deflect back to its normal condition. A supported member 22, FIG. 3, is placed or seated upon the head 12 of the bushing 10 and includes an aperture 23 aligned with the rigid sleeve 14. A through bolt 25 is disposed through the aperture 23 in the supported member 22, the rigid sleeve 14 and skirt 13. A washer plate 26 is received on the bolt 25 adjacent the skirt l3 and is clamped against the skirt 13 by a nut 27. As the nut 27 is tightened. the washer plate 26 engages the remote end of the skirt l3 and compresses it axially toward the supporting member 20. The arched contour of the skirt 13 causes the central section of the skirt 13 to buckle or bulge radially outward as shown in FIG. 3. This axial compression and radial bulging is continued until the nut 27 is tightened solidly against the washer plate 26 as shown in FIG. 4 with the skirt l3 wedged between the underside of the supporting member 20 and the washer plate 27.

Following installation. the weight of the supported member 22 will be carried partially in compression by the head 12 and partially in shear by the central body portion 11 of the bushing 10. Rebound will be provided in a similar manner by the folded skirt l3 and central body portion 11.

In the drawings and specification. there has been set forth a preferred embodiment of the invention and. although specific terms are employed. they are used in a generic and descriptive sense only and not for purposes of limitation.

What is claimed is:

l. A resilient mounting comprising:

a. a tubular bushing of elastomeric material having a central body portion and opposite end portions. said body portion having an exposed outer surface. one of said end portions being an enlarged head projecting radially outside the body portion and the other end portion being an elongate tubular skirt extending axially from the body portion of the bushing; and

b. a rigid tubular sleeve disposed within and bonded to the bushing. the sleeve having one end terminating substantially flush with the head of the bushing and having its other end terminating adjacent the skirt of the bushing,

the tubular skirt having an internal diameter that (i) throughout the length of the skirt is at least equal to the internal diameter of the body portion of the bushing and (ii) adjacent the sleeve is greater than the outside diameter of the sleeve. the wall of the skirt being arched radially outward beyond the outside diameter of the body portion with the end of the skirt remote from the body portion tapering radially inward to an outside diameter substantially equal to the outside diameter of the body portion.

2. A resilient mounting. according to claim 1, wherein the wall of said tubular skirt is comparatively thick intermediate opposite ends relative to the thickness ajdacent opposite ends thereof.

3. A resilient mounting. according to claim 1, wherein the outside diameter of said tubular skirt tapers radially outward adjacent the body portion of said bushing and tapers radially inward adjacent the remote end of said skirt.

4. A resilient mounting, according to claim 3, wherein the internal diameter of said tubular skirt is generally cylindrical adjacent the body portion of said bushing and tapers radially inward adjacent the remote end of said skirt.

5. In a resilient mounting assembly a. a supporting member having an aperture therethrough,

b. a tubular bushing of elastomeric material having a central body portion and opposite end portions, the body portion being disposed within the aperture of the supporting member and having an outer surface for radial engagement with a surface associated with the supporting member. one of the end portions of the bushing being an enlarged head projecting radially outside the body portion and resting upon a first surface of the supporting member adjacent said aperture. the other end portion of the bushing being an elongate tubular skirt extending axially from the body portion of the bushing be yond a second surface of the supporting member opposite the first surface. the tubular skirt of the bushing having an internal diameter that (i) throughout the length of the skirt is at least equal to the internal diameter of the body portion of the bushing. and (ii) adjacent the sleeve is greater than the outside diameter of the sleeve. the wall of the skirt being arched radially outward beyond the outside diameter of the body portion with the end of the skirt remote from the body portion tapering radially inward to an outside diameter substantially equal to the outside diameter of the body portion to facilitate insertion of said skirt through the aperture in said supporting member.

0. a rigid tubular sleeve disposed within and bonded to the bushing, the sleeve having one end terminating substantially flush with the head of the bushing and having its other end terminating adjacent the skirt of the bushing.

d. a supported member resting on the head of the bushing and having an aperture therethrough aligned with the tubular sleeve. and

e. means for coupling together the supporting member and the supported member, the coupling means including (i) a bolt disposed through the aperture in the supported member and through the sleeve and projecting axially beyond the end of the tubular skirt. and (ii) means received on the portion of the bolt projecting beyond the skirt and being adjustable along the bolt for compressing the tubular bushing axially of the bolt between the supporting member and said adjustable means and between said supported and supporting members whereby said skirt intermediate its ends is buckled radially 6 ing and tapers radially inward adjacent the remote end of the skirt.

8. A mounting assembly. according to claim 7. wherein the internal diameter of said tubular skirtis generally cylindrical adjacent the body portion of the bushing and tapers radially inward adjacent the remote end of the skirt. 

1. A resilient mounting comprising: a. a tubular bushing of elastomeric material having a central body portion and opposite end portions, said body portion having an exposed outer surface, one of said end portions being an enlarged head projecting radially outside the body portion and the other end portion being an elongate tubular skirt extending axially from the body portion of the bushing; and b. a rigid tubular sleeve disposed within and bonded to the bushing, the sleeve having one end terminating substantially flush with the head of the bushing and having its other end terminating adjacent the skirt of the bushing, the tubular skirt having an internal diameter that (i) throughout the length of the skirt is at least equal to the internal diameter of the body portion of the bushing and (ii) adjacent the sleeve is greater than the outside diameter of the sleeve, the wall of the skirt being arched radially outward beyond the outside diameter of the body portion with the end of the skirt remote from the body portion tapering radially inward to an outside diameter substantially equal to the outside diameter of the body portion.
 2. A resilient mounting, according to claim 1, wherein the wall of said tubular skirt is comparatively thick intermediate opposite ends relative to the thickness ajdacent opposite ends thereof.
 3. A resilient mounting, according to claim 1, wherein the outside diameter of said tubular skirt tapers radially outward adjacent the body portion of said bushing and tapers radially inward adjacent the remote end of said skirt.
 4. A resilient mounting, according to claim 3, wherein the internal diameter of said tubular skirt is generally cylindrical adjacent the body portion of said bushing and tapers radially inward adjacent the remote end of said skirt.
 5. In a resilient mounting assembly a. a supporting member having an aperture therethrough, b. a tubular bushing of elastomeric material having a central body portion and opposite end portions, the body portion being disposed within the aperture of the supporting member and having an outer surface for radial engagement with a surface associated with the supporting member, one of the end portions of the buShing being an enlarged head projecting radially outside the body portion and resting upon a first surface of the supporting member adjacent said aperture, the other end portion of the bushing being an elongate tubular skirt extending axially from the body portion of the bushing beyond a second surface of the supporting member opposite the first surface, the tubular skirt of the bushing having an internal diameter that (i) throughout the length of the skirt is at least equal to the internal diameter of the body portion of the bushing, and (ii) adjacent the sleeve is greater than the outside diameter of the sleeve, the wall of the skirt being arched radially outward beyond the outside diameter of the body portion with the end of the skirt remote from the body portion tapering radially inward to an outside diameter substantially equal to the outside diameter of the body portion to facilitate insertion of said skirt through the aperture in said supporting member, c. a rigid tubular sleeve disposed within and bonded to the bushing, the sleeve having one end terminating substantially flush with the head of the bushing and having its other end terminating adjacent the skirt of the bushing, d. a supported member resting on the head of the bushing and having an aperture therethrough aligned with the tubular sleeve, and e. means for coupling together the supporting member and the supported member, the coupling means including (i) a bolt disposed through the aperture in the supported member and through the sleeve and projecting axially beyond the end of the tubular skirt, and (ii) means received on the portion of the bolt projecting beyond the skirt and being adjustable along the bolt for compressing the tubular bushing axially of the bolt between the supporting member and said adjustable means and between said supported and supporting members whereby said skirt intermediate its ends is buckled radially outwardly and folded between said adjustable means and the supporting member.
 6. A mounting assembly, according to claim 5, wherein the wall of the tubular skirt is comparatively thick intermediate opposite ends relative to the thickness adjacent opposite ends thereof.
 7. A mounting assembly, according to claim 5, wherein the outside diameter of the tubular skirt tapers radially outward adjacent the body portion of the bushing and tapers radially inward adjacent the remote end of the skirt.
 8. A mounting assembly, according to claim 7, wherein the internal diameter of said tubular skirt is generally cylindrical adjacent the body portion of the bushing and tapers radially inward adjacent the remote end of the skirt. 